Hi, i have seen the oops below after i clicked on "Rescan devices" in xcdroast which should call "cdrecord -scanbus" or something. Nevertheless - I have attached a firewire DVD Burner (Sony DRU-500) This is a 2.6.1rc1 without any patches ... Attached on the USB Bus was a MemoryStick which shows up as SCSI Device too. Unable to handle kernel NULL pointer dereference at virtual address 000009f8 printing eip: c015da96 *pde = 00000000 Oops: 0000 [#1] CPU: 0 EIP: 0060:[] Not tainted EFLAGS: 00010202 EIP is at cdev_get+0x2a/0xb2 eax: dfd88000 ebx: 000009f8 ecx: 00000015 edx: c015d993 esi: de5e4e00 edi: 00000001 ebp: de5e4e00 esp: dfd89ed8 ds: 007b es: 007b ss: 0068 Process cdrecord.mmap (pid: 19734, threadinfo=dfd88000 task=de0986a0) Stack: c012f075 df3a0300 00000000 dfd88000 c015d9a2 de5e4e00 c022dbfe 01500000 de5e4e00 00000006 c015d98e 00000000 dfd88000 00000000 00000000 00000000 c015d857 dff70c00 01500000 dfd89f28 00000000 da6fbc00 c7fccc0c 00000001 Call Trace: [] in_group_p+0x25/0x2d [] exact_lock+0xf/0x1e [] kobj_lookup+0x102/0x1d5 [] exact_match+0x0/0x5 [] chrdev_open+0x196/0x214 [] dentry_open+0x13d/0x1fe [] filp_open+0x62/0x64 [] sys_open+0x5b/0x8b [] syscall_call+0x7/0xb Code: 83 3b 02 74 7f ff 83 00 01 00 00 b8 00 e0 ff ff 21 e0 83 68 <6>note: cdrecord.mmap[19734] exited with preempt_count 1 Unable to handle kernel NULL pointer dereference at virtual address 000009f8 printing eip: c015da96 *pde = 00000000 Oops: 0000 [#2] CPU: 0 EIP: 0060:[] Not tainted EFLAGS: 00010202 EIP is at cdev_get+0x2a/0xb2 eax: dc1c8000 ebx: 000009f8 ecx: 00000015 edx: c015d993 esi: de5e4e00 edi: 00000001 ebp: de5e4e00 esp: dc1c9ed8 ds: 007b es: 007b ss: 0068 Process cdrecord.mmap (pid: 19740, threadinfo=dc1c8000 task=de5eccc0) Stack: c549cb80 df3a0300 00000000 dc1c8000 c015d9a2 de5e4e00 c022dbfe 01500000 de5e4e00 00000006 c015d98e 00000000 dc1c8000 00000000 00000000 00000000 c015d857 dff70c00 01500000 dc1c9f28 00000000 c3668d80 c7fccc0c 00000001 Call Trace: [] exact_lock+0xf/0x1e [] kobj_lookup+0x102/0x1d5 [] exact_match+0x0/0x5 [] chrdev_open+0x196/0x214 [] dentry_open+0x13d/0x1fe [] filp_open+0x62/0x64 [] sys_open+0x5b/0x8b [] syscall_call+0x7/0xb Code: 83 3b 02 74 7f ff 83 00 01 00 00 b8 00 e0 ff ff 21 e0 83 68 <6>note: cdrecord.mmap[19740] exited with preempt_count 1 bad: scheduling while atomic! Call Trace: [] schedule+0x576/0x57b [] unmap_page_range+0x43/0x69 [] unmap_vmas+0x1b0/0x208 [] exit_mmap+0x7c/0x190 [] mmput+0x66/0xb5 [] do_exit+0x150/0x40a [] do_page_fault+0x0/0x50c [] do_divide_error+0x0/0xfa [] do_page_fault+0x1d8/0x50c [] buffered_rmqueue+0xd4/0x16e [] __alloc_pages+0xa6/0x314 [] find_get_page+0x2d/0x56 [] filemap_nopage+0x2c2/0x35a [] do_page_fault+0x0/0x50c [] error_code+0x2d/0x38 [] exact_lock+0x0/0x1e [] cdev_get+0x2a/0xb2 [] exact_lock+0xf/0x1e [] kobj_lookup+0x102/0x1d5 [] exact_match+0x0/0x5 [] chrdev_open+0x196/0x214 [] dentry_open+0x13d/0x1fe [] filp_open+0x62/0x64 [] sys_open+0x5b/0x8b [] syscall_call+0x7/0xb request_module: failed /sbin/modprobe -- block-major-11-1. error = 256 request_module: failed /sbin/modprobe -- block-major-11-1. error = 256 request_module: failed /sbin/modprobe -- block-major-11-1. error = 256 Dmesg PIC (acpi_id[0x00] lapic_id[0x00] enabled) Processor #0 15:2 APIC version 20 ACPI: LAPIC_NMI (acpi_id[0xff] polarity[0x1] trigger[0x1] lint[0x1]) ACPI: IOAPIC (id[0x01] address[0xfec00000] global_irq_base[0x0]) IOAPIC[0]: Assigned apic_id 1 IOAPIC[0]: apic_id 1, version 32, address 0xfec00000, IRQ 0-23 ACPI: INT_SRC_OVR (bus[0] irq[0x0] global_irq[0x2] polarity[0x1] trigger[0x1]) ACPI: INT_SRC_OVR (bus[0] irq[0x9] global_irq[0x9] polarity[0x1] trigger[0x3]) Enabling APIC mode: Flat. Using 1 I/O APICs Using ACPI (MADT) for SMP configuration information Building zonelist for node : 0 Kernel command line: auto BOOT_IMAGE=Linux ro root=306 Initializing CPU#0 PID hash table entries: 2048 (order 11: 16384 bytes) Detected 2392.592 MHz processor. Using tsc for high-res timesource Console: colour VGA+ 80x25 Memory: 514604k/523776k available (1968k kernel code, 8356k reserved, 827k data, 144k init, 0k highmem) Checking if this processor honours the WP bit even in supervisor mode... Ok. Calibrating delay loop... 4718.59 BogoMIPS Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) Mount-cache hash table entries: 512 (order: 0, 4096 bytes) CPU: After generic identify, caps: bfebfbff 00000000 00000000 00000000 CPU: After vendor identify, caps: bfebfbff 00000000 00000000 00000000 CPU: Trace cache: 12K uops, L1 D cache: 8K CPU: L2 cache: 512K CPU: After all inits, caps: bfebfbff 00000000 00000000 00000080 Intel machine check architecture supported. Intel machine check reporting enabled on CPU#0. CPU#0: Intel P4/Xeon Extended MCE MSRs (12) available CPU#0: Thermal monitoring enabled CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz stepping 07 Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Checking 'hlt' instruction... OK. POSIX conformance testing by UNIFIX enabled ExtINT on CPU#0 ESR value before enabling vector: 00000000 ESR value after enabling vector: 00000000 ENABLING IO-APIC IRQs init IO_APIC IRQs IO-APIC (apicid-pin) 1-0, 1-16, 1-17, 1-18, 1-19, 1-20, 1-21, 1-22, 1-23 not connected. ..TIMER: vector=0x31 pin1=2 pin2=-1 number of MP IRQ sources: 15. number of IO-APIC #1 registers: 24. testing the IO APIC....................... IO APIC #1...... .... register #00: 01000000 ....... : physical APIC id: 01 ....... : Delivery Type: 0 ....... : LTS : 0 .... register #01: 00178020 ....... : max redirection entries: 0017 ....... : PRQ implemented: 1 ....... : IO APIC version: 0020 .... register #02: 00000000 ....... : arbitration: 00 .... register #03: 00000001 ....... : Boot DT : 1 .... IRQ redirection table: NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect: 00 000 00 1 0 0 0 0 0 0 00 01 001 01 0 0 0 0 0 1 1 39 02 001 01 0 0 0 0 0 1 1 31 03 001 01 0 0 0 0 0 1 1 41 04 001 01 0 0 0 0 0 1 1 49 05 001 01 0 0 0 0 0 1 1 51 06 001 01 0 0 0 0 0 1 1 59 07 001 01 0 0 0 0 0 1 1 61 08 001 01 0 0 0 0 0 1 1 69 09 001 01 1 1 0 0 0 1 1 71 0a 001 01 0 0 0 0 0 1 1 79 0b 001 01 0 0 0 0 0 1 1 81 0c 001 01 0 0 0 0 0 1 1 89 0d 001 01 0 0 0 0 0 1 1 91 0e 001 01 0 0 0 0 0 1 1 99 0f 001 01 0 0 0 0 0 1 1 A1 10 000 00 1 0 0 0 0 0 0 00 11 000 00 1 0 0 0 0 0 0 00 12 000 00 1 0 0 0 0 0 0 00 13 000 00 1 0 0 0 0 0 0 00 14 000 00 1 0 0 0 0 0 0 00 15 000 00 1 0 0 0 0 0 0 00 16 000 00 1 0 0 0 0 0 0 00 17 000 00 1 0 0 0 0 0 0 00 IRQ to pin mappings: IRQ0 -> 0:2 IRQ1 -> 0:1 IRQ3 -> 0:3 IRQ4 -> 0:4 IRQ5 -> 0:5 IRQ6 -> 0:6 IRQ7 -> 0:7 IRQ8 -> 0:8 IRQ9 -> 0:9 IRQ10 -> 0:10 IRQ11 -> 0:11 IRQ12 -> 0:12 IRQ13 -> 0:13 IRQ14 -> 0:14 IRQ15 -> 0:15 .................................... done. Using local APIC timer interrupts. calibrating APIC timer ... ..... CPU clock speed is 2391.0998 MHz. ..... host bus clock speed is 132.0888 MHz. NET: Registered protocol family 16 PCI: PCI BIOS revision 2.10 entry at 0xfd987, last bus=2 PCI: Using configuration type 1 mtrr: v2.0 (20020519) ACPI: Subsystem revision 20031002 tbxface-0117 [03] acpi_load_tables : ACPI Tables successfully acquired Parsing all Control Methods:..................................................................................................... Table [DSDT](id F004) - 410 Objects with 51 Devices 101 Methods 13 Regions ACPI Namespace successfully loaded at root c03f813c IOAPIC[0]: Set PCI routing entry (1-9 -> 0x71 -> IRQ 9 Mode:1 Active:0) evxfevnt-0093 [04] acpi_enable : Transition to ACPI mode successful evgpeblk-0748 [06] ev_create_gpe_block : GPE 00 to 31 [_GPE] 4 regs at 000000000000F028 on int 9 Completing Region/Field/Buffer/Package initialization:.......................................................................... Initialized 13/13 Regions 6/6 Fields 33/33 Buffers 22/22 Packages (418 nodes) Executing all Device _STA and_INI methods:.................................................... 52 Devices found containing: 52 _STA, 2 _INI methods ACPI: Interpreter enabled ACPI: Using IOAPIC for interrupt routing ACPI: PCI Root Bridge [PCI0] (00:00) PCI: Probing PCI hardware (bus 00) PCI: Ignoring BAR0-3 of IDE controller 0000:00:1f.1 Transparent bridge - 0000:00:1e.0 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.AGPB._PRT] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCIH._PRT] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 *9 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 *5 6 7 9 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 *10 11 12 14 15) ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 9 10 *11 12 14 15) ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 9 10 *11 12 14 15) ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 9 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 9 10 11 12 14 15) ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 *9 10 11 12 14 15) IOAPIC[0]: Set PCI routing entry (1-16 -> 0xa9 -> IRQ 16 Mode:1 Active:1) 00:00:02[A] -> 1-16 -> IRQ 16 IOAPIC[0]: Set PCI routing entry (1-17 -> 0xb1 -> IRQ 17 Mode:1 Active:1) 00:00:02[B] -> 1-17 -> IRQ 17 IOAPIC[0]: Set PCI routing entry (1-18 -> 0xb9 -> IRQ 18 Mode:1 Active:1) 00:00:1f[A] -> 1-18 -> IRQ 18 Pin 1-17 already programmed Pin 1-16 already programmed IOAPIC[0]: Set PCI routing entry (1-19 -> 0xc1 -> IRQ 19 Mode:1 Active:1) 00:00:1d[B] -> 1-19 -> IRQ 19 Pin 1-18 already programmed IOAPIC[0]: Set PCI routing entry (1-23 -> 0xc9 -> IRQ 23 Mode:1 Active:1) 00:00:1d[D] -> 1-23 -> IRQ 23 Pin 1-16 already programmed Pin 1-17 already programmed Pin 1-17 already programmed Pin 1-18 already programmed Pin 1-19 already programmed IOAPIC[0]: Set PCI routing entry (1-20 -> 0xd1 -> IRQ 20 Mode:1 Active:1) 00:02:05[D] -> 1-20 -> IRQ 20 Pin 1-18 already programmed Pin 1-19 already programmed Pin 1-20 already programmed IOAPIC[0]: Set PCI routing entry (1-21 -> 0xd9 -> IRQ 21 Mode:1 Active:1) 00:02:07[D] -> 1-21 -> IRQ 21 Pin 1-20 already programmed Pin 1-19 already programmed Pin 1-20 already programmed Pin 1-21 already programmed IOAPIC[0]: Set PCI routing entry (1-22 -> 0xe1 -> IRQ 22 Mode:1 Active:1) 00:02:09[D] -> 1-22 -> IRQ 22 Pin 1-20 already programmed Pin 1-21 already programmed Pin 1-22 already programmed Pin 1-23 already programmed Pin 1-21 already programmed Pin 1-22 already programmed Pin 1-23 already programmed Pin 1-16 already programmed Pin 1-22 already programmed Pin 1-23 already programmed Pin 1-16 already programmed Pin 1-17 already programmed PCI: Using ACPI for IRQ routing PCI: if you experience problems, try using option 'pci=noacpi' or even 'acpi=off' SBF: Simple Boot Flag extension found and enabled. SBF: Setting boot flags 0x1 Machine check exception polling timer started. cpufreq: P4/Xeon(TM) CPU On-Demand Clock Modulation available speedstep-smi: signature:0x00008680, command:0x0000e6f5, event:0x00000000, perf_level:0x47534943. IA-32 Microcode Update Driver: v1.13 Initializing Cryptographic API ACPI: Power Button (FF) [PWRF] ACPI: Processor [CPU0] (supports C1) pty: 256 Unix98 ptys configured Real Time Clock Driver v1.12 Non-volatile memory driver v1.2 hw_random: RNG not detected Linux agpgart interface v0.100 (c) Dave Jones agpgart: Detected an Intel 845G Chipset. agpgart: Maximum main memory to use for agp memory: 439M agpgart: AGP aperture is 64M @ 0xe0000000 [drm] Initialized mga 3.1.0 20021029 on minor 0 Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing disabled ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A Using anticipatory io scheduler Floppy drive(s): fd0 is 1.44M FDC 0 is a post-1991 82077 Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx ICH4: IDE controller at PCI slot 0000:00:1f.1 PCI: Enabling device 0000:00:1f.1 (0005 -> 0007) ICH4: chipset revision 1 ICH4: not 100% native mode: will probe irqs later ide0: BM-DMA at 0x2800-0x2807, BIOS settings: hda:DMA, hdb:pio ide1: BM-DMA at 0x2808-0x280f, BIOS settings: hdc:DMA, hdd:DMA hda: Maxtor 2F040L0, ATA DISK drive ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 hdc: Maxtor 6Y120L0, ATA DISK drive hdd: JLMS XJ-HD166S, ATAPI CD/DVD-ROM drive ide1 at 0x170-0x177,0x376 on irq 15 hda: max request size: 128KiB hda: 80293248 sectors (41110 MB) w/2048KiB Cache, CHS=65535/16/63, UDMA(100) hda: hda1 < hda5 hda6 hda7 hda8 hda9 hda10 > hdc: max request size: 128KiB hdc: 240121728 sectors (122942 MB) w/2048KiB Cache, CHS=65535/16/63, UDMA(33) hdc: unknown partition table mice: PS/2 mouse device common for all mice serio: i8042 AUX port at 0x60,0x64 irq 12 serio: i8042 KBD port at 0x60,0x64 irq 1 input: AT Translated Set 2 keyboard on isa0060/serio0 NET: Registered protocol family 2 IP: routing cache hash table of 4096 buckets, 32Kbytes TCP: Hash tables configured (established 32768 bind 65536) Initializing IPsec netlink socket NET: Registered protocol family 1 NET: Registered protocol family 10 IPv6 over IPv4 tunneling driver NET: Registered protocol family 17 802.1Q VLAN Support v1.8 Ben Greear All bugs added by David S. Miller BIOS EDD facility v0.10 2003-Oct-11, 1 devices found Please report your BIOS at http://domsch.com/linux/edd30/results.html PM: Reading pmdisk image. PM: Resume from disk failed. ACPI: (supports S0 S1 S3 S4 S5) EXT3-fs: INFO: recovery required on readonly filesystem. EXT3-fs: write access will be enabled during recovery. kjournald starting. Commit interval 5 seconds EXT3-fs: recovery complete. EXT3-fs: mounted filesystem with ordered data mode. VFS: Mounted root (ext3 filesystem) readonly. Freeing unused kernel memory: 144k freed Adding 505976k swap on /dev/hda5. Priority:-1 extents:1 EXT3 FS on hda6, internal journal eepro100.c:v1.09j-t 9/29/99 Donald Becker http://www.scyld.com/network/eepro100.html eepro100.c: $Revision: 1.36 $ 2000/11/17 Modified by Andrey V. Savochkin and others eth0: OEM i82557/i82558 10/100 Ethernet, 00:30:05:3D:B1:E9, IRQ 20. Board assembly 000000-000, Physical connectors present: RJ45 Primary interface chip i82555 PHY #1. General self-test: passed. Serial sub-system self-test: passed. Internal registers self-test: passed. ROM checksum self-test: passed (0x04f4518b). ohci1394: $Rev: 1087 $ Ben Collins ohci1394: fw-host0: OHCI-1394 1.1 (PCI): IRQ=[18] MMIO=[d1005000-d10057ff] Max Packet=[2048] SCSI subsystem initialized device-mapper: 4.0.0-ioctl (2003-06-04) initialised: dm@uk.sistina.com ieee1394: Node added: ID:BUS[0-00:1023] GUID[0004830252004f0f] ieee1394: Host added: ID:BUS[0-01:1023] GUID[0001b7000001515b] sbp2: $Rev: 1082 $ Ben Collins scsi0 : SCSI emulation for IEEE-1394 SBP-2 Devices hdd: ATAPI 48X DVD-ROM drive, 512kB Cache, UDMA(33) Uniform CD-ROM driver Revision: 3.12 cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. cdrom: open failed. ieee1394: sbp2: Logged into SBP-2 device ieee1394: sbp2: Node 0-00:1023: Max speed [S400] - Max payload [2048] Vendor: SONY Model: DVD RW DRU-500A Rev: 2.0e Type: CD-ROM ANSI SCSI revision: 02 Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0, type 5 kjournald starting. Commit interval 5 seconds EXT3 FS on hda7, internal journal EXT3-fs: mounted filesystem with ordered data mode. kjournald starting. Commit interval 5 seconds EXT3 FS on hda8, internal journal EXT3-fs: mounted filesystem with ordered data mode. kjournald starting. Commit interval 5 seconds EXT3 FS on hda9, internal journal EXT3-fs: mounted filesystem with ordered data mode. kjournald starting. Commit interval 5 seconds EXT3 FS on hda10, internal journal EXT3-fs: mounted filesystem with ordered data mode. kjournald starting. Commit interval 5 seconds EXT3 FS on dm-1, internal journal EXT3-fs: mounted filesystem with ordered data mode. drivers/usb/core/usb.c: registered new driver usbfs drivers/usb/core/usb.c: registered new driver hub ehci_hcd 0000:00:1d.7: EHCI Host Controller PCI: Setting latency timer of device 0000:00:1d.7 to 64 ehci_hcd 0000:00:1d.7: irq 23, pci mem e088a000 ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 1 PCI: cache line size of 128 is not supported by device 0000:00:1d.7 ehci_hcd 0000:00:1d.7: USB 2.0 enabled, EHCI 1.00, driver 2003-Jun-13 hub 1-0:1.0: USB hub found hub 1-0:1.0: 6 ports detected drivers/usb/host/uhci-hcd.c: USB Universal Host Controller Interface driver v2.1 uhci_hcd 0000:00:1d.0: UHCI Host Controller PCI: Setting latency timer of device 0000:00:1d.0 to 64 uhci_hcd 0000:00:1d.0: irq 16, io base 00001000 uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 2 hub 2-0:1.0: USB hub found hub 2-0:1.0: 2 ports detected uhci_hcd 0000:00:1d.1: UHCI Host Controller PCI: Setting latency timer of device 0000:00:1d.1 to 64 uhci_hcd 0000:00:1d.1: irq 19, io base 00001400 uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 3 hub 3-0:1.0: USB hub found hub 3-0:1.0: 2 ports detected uhci_hcd 0000:00:1d.2: UHCI Host Controller PCI: Setting latency timer of device 0000:00:1d.2 to 64 uhci_hcd 0000:00:1d.2: irq 18, io base 00001800 uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 4 hub 4-0:1.0: USB hub found hub 4-0:1.0: 2 ports detected hub 1-0:1.0: new USB device on port 2, assigned address 2 Disabled Privacy Extensions on device c0380f60(lo) hub 2-0:1.0: new USB device on port 1, assigned address 2 ip_tables: (C) 2000-2002 Netfilter core team Flo -- Florian Lohoff flo@rfc822.org +49-171-2280134 Heisenberg may have been here.